Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19
Estimates of the distribution and density of Antarctic krill (Euphausia superba Dana, 1850) were derived from a large-scale survey conducted during the austral summer in the Southwest Atlantic sector of the Southern Ocean and across the Scotia Sea in 2018–19, the ‘2018–19 Area 48 Survey’. Survey ves...
Published in: | Journal of Crustacean Biology |
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/2982441 https://doi.org/10.1093/jcbiol/ruab046 |
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ftimr:oai:imr.brage.unit.no:11250/2982441 2023-05-15T13:44:00+02:00 Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 Krafft, Bjørn Arne Macaulay, Gavin Skaret, Georg Knutsen, Tor Bergstad, Odd A Lowther, Andrew Huse, Geir Fielding, Sophie Trathan, Philip Murphy, Eugene Choi, Seok-Gwan Chung, Sangdeok Han, Inwoo Lee, Kyounghoon Zhao, Xianyong Wang, Xinliang Ying, Yiping Yu, Xiaotao Demianenko, Kostiantyn Podhornyi, Viktor Vishnyakova, Karina Pshenichnov, Leonid Chuklin, Andrii Shyshman, Hanna Cox, Martin J Reid, Keith Watters, George M Reiss, Christian S Hinke, Jefferson T Arata, Javier Godø, Olav R Hoem, Nils 2021 application/pdf https://hdl.handle.net/11250/2982441 https://doi.org/10.1093/jcbiol/ruab046 eng eng https://academic.oup.com/jcb/article/41/3/ruab046/6374001 Havforskningsinstituttet: 14246 Havforskningsinstituttet: 15208 Journal of Crustacean Biology. 2021, 41 (3), . urn:issn:0278-0372 https://hdl.handle.net/11250/2982441 https://doi.org/10.1093/jcbiol/ruab046 cristin:1964514 0 41 Journal of Crustacean Biology 3 Peer reviewed Journal article 2021 ftimr https://doi.org/10.1093/jcbiol/ruab046 2022-03-09T23:39:25Z Estimates of the distribution and density of Antarctic krill (Euphausia superba Dana, 1850) were derived from a large-scale survey conducted during the austral summer in the Southwest Atlantic sector of the Southern Ocean and across the Scotia Sea in 2018–19, the ‘2018–19 Area 48 Survey’. Survey vessels were provided by Norway, the Association of Responsible Krill harvesting companies and Aker BioMarine AS, the United Kingdom, Ukraine, Republic of Korea, and China. Survey design followed the transects of the Commission for the Conservation of Antarctic Marine Living Resources synoptic survey, carried out in 2000 and from regular national surveys performed in the South Atlantic sector by the U.S., China, Republic of Korea, Norway, and the U.K. The 2018–19 Area 48 Survey represents only the second large-scale survey performed in the area and this joint effort resulted in the largest ever total transect line (19,500 km) coverage carried out as one single exercise in the Southern Ocean. We delineated and integrated acoustic backscatter arising from krill swarms to produce distribution maps of krill areal biomass density and standing stock (biomass) estimates. Krill standing stock for the Area 48 was estimated to be 62.6 megatonnes (mean density of 30 g m–2 over 2 million km2) with a sampling coefficient variation of 13%. The highest mean krill densities were found in the South Orkney Islands stratum (93.2 g m–2) and the lowest in the South Georgia Island stratum (6.4 g m–2). The krill densities across the strata compared to those found during the previous survey indicate some regional differences in distribution and biomass. It is currently not possible to assign any such differences or lack of differences between the two survey datasets to longer term trends in the environment, krill stocks or fishing pressure. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Scotia Sea South Georgia Island South Orkney Islands Southern Ocean Institute for Marine Research: Brage IMR Antarctic Southern Ocean Austral Scotia Sea Norway South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) South Georgia Island ENVELOPE(-36.750,-36.750,-54.250,-54.250) Journal of Crustacean Biology |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
Estimates of the distribution and density of Antarctic krill (Euphausia superba Dana, 1850) were derived from a large-scale survey conducted during the austral summer in the Southwest Atlantic sector of the Southern Ocean and across the Scotia Sea in 2018–19, the ‘2018–19 Area 48 Survey’. Survey vessels were provided by Norway, the Association of Responsible Krill harvesting companies and Aker BioMarine AS, the United Kingdom, Ukraine, Republic of Korea, and China. Survey design followed the transects of the Commission for the Conservation of Antarctic Marine Living Resources synoptic survey, carried out in 2000 and from regular national surveys performed in the South Atlantic sector by the U.S., China, Republic of Korea, Norway, and the U.K. The 2018–19 Area 48 Survey represents only the second large-scale survey performed in the area and this joint effort resulted in the largest ever total transect line (19,500 km) coverage carried out as one single exercise in the Southern Ocean. We delineated and integrated acoustic backscatter arising from krill swarms to produce distribution maps of krill areal biomass density and standing stock (biomass) estimates. Krill standing stock for the Area 48 was estimated to be 62.6 megatonnes (mean density of 30 g m–2 over 2 million km2) with a sampling coefficient variation of 13%. The highest mean krill densities were found in the South Orkney Islands stratum (93.2 g m–2) and the lowest in the South Georgia Island stratum (6.4 g m–2). The krill densities across the strata compared to those found during the previous survey indicate some regional differences in distribution and biomass. It is currently not possible to assign any such differences or lack of differences between the two survey datasets to longer term trends in the environment, krill stocks or fishing pressure. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Krafft, Bjørn Arne Macaulay, Gavin Skaret, Georg Knutsen, Tor Bergstad, Odd A Lowther, Andrew Huse, Geir Fielding, Sophie Trathan, Philip Murphy, Eugene Choi, Seok-Gwan Chung, Sangdeok Han, Inwoo Lee, Kyounghoon Zhao, Xianyong Wang, Xinliang Ying, Yiping Yu, Xiaotao Demianenko, Kostiantyn Podhornyi, Viktor Vishnyakova, Karina Pshenichnov, Leonid Chuklin, Andrii Shyshman, Hanna Cox, Martin J Reid, Keith Watters, George M Reiss, Christian S Hinke, Jefferson T Arata, Javier Godø, Olav R Hoem, Nils |
spellingShingle |
Krafft, Bjørn Arne Macaulay, Gavin Skaret, Georg Knutsen, Tor Bergstad, Odd A Lowther, Andrew Huse, Geir Fielding, Sophie Trathan, Philip Murphy, Eugene Choi, Seok-Gwan Chung, Sangdeok Han, Inwoo Lee, Kyounghoon Zhao, Xianyong Wang, Xinliang Ying, Yiping Yu, Xiaotao Demianenko, Kostiantyn Podhornyi, Viktor Vishnyakova, Karina Pshenichnov, Leonid Chuklin, Andrii Shyshman, Hanna Cox, Martin J Reid, Keith Watters, George M Reiss, Christian S Hinke, Jefferson T Arata, Javier Godø, Olav R Hoem, Nils Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 |
author_facet |
Krafft, Bjørn Arne Macaulay, Gavin Skaret, Georg Knutsen, Tor Bergstad, Odd A Lowther, Andrew Huse, Geir Fielding, Sophie Trathan, Philip Murphy, Eugene Choi, Seok-Gwan Chung, Sangdeok Han, Inwoo Lee, Kyounghoon Zhao, Xianyong Wang, Xinliang Ying, Yiping Yu, Xiaotao Demianenko, Kostiantyn Podhornyi, Viktor Vishnyakova, Karina Pshenichnov, Leonid Chuklin, Andrii Shyshman, Hanna Cox, Martin J Reid, Keith Watters, George M Reiss, Christian S Hinke, Jefferson T Arata, Javier Godø, Olav R Hoem, Nils |
author_sort |
Krafft, Bjørn Arne |
title |
Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 |
title_short |
Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 |
title_full |
Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 |
title_fullStr |
Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 |
title_full_unstemmed |
Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19 |
title_sort |
standing stock of antarctic krill (euphausia superba dana, 1850) (euphausiacea) in the southwest atlantic sector of the southern ocean, 2018-19 |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2982441 https://doi.org/10.1093/jcbiol/ruab046 |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-36.750,-36.750,-54.250,-54.250) |
geographic |
Antarctic Southern Ocean Austral Scotia Sea Norway South Orkney Islands South Georgia Island |
geographic_facet |
Antarctic Southern Ocean Austral Scotia Sea Norway South Orkney Islands South Georgia Island |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Scotia Sea South Georgia Island South Orkney Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Scotia Sea South Georgia Island South Orkney Islands Southern Ocean |
op_source |
0 41 Journal of Crustacean Biology 3 |
op_relation |
https://academic.oup.com/jcb/article/41/3/ruab046/6374001 Havforskningsinstituttet: 14246 Havforskningsinstituttet: 15208 Journal of Crustacean Biology. 2021, 41 (3), . urn:issn:0278-0372 https://hdl.handle.net/11250/2982441 https://doi.org/10.1093/jcbiol/ruab046 cristin:1964514 |
op_doi |
https://doi.org/10.1093/jcbiol/ruab046 |
container_title |
Journal of Crustacean Biology |
_version_ |
1766195877646434304 |